Meta+Tests/LibGfx: Make check-jbig2-json.sh call compile.sh

That way, it picks up the recent speed-up in compile.sh.

To make this work, let compile.sh optionally take the path to
jbig2-from-json as first argument.

Takes the time to run Meta/check-jbig2-json.sh from 1.7s to 0.29s
on my system.

Author: nico

Meta/check-jbig2-json.sh

@@ -33,10 +33,7 @@ if [ -z "${JBIG2_FROM_JSON_BINARY:-}" ] ; then
     JBIG2_FROM_JSON_BINARY="Build/lagom/bin/jbig2-from-json"
 fi
 
-for f in "${json_files[@]}"; do
-  f_jb2=Tests/LibGfx/test-inputs/jbig2/$(basename "${f%.json}.jbig2")
-  "$JBIG2_FROM_JSON_BINARY" -o "$f_jb2" "$f"
-done
+Tests/LibGfx/test-inputs/jbig2/json/compile.sh "$JBIG2_FROM_JSON_BINARY"
 
 # annex-h.jbig2 is fixed data from Annex H of the JBIG2 spec.
 # It should never change, if it does, that's a bug.

Tests/LibGfx/test-inputs/jbig2/json/compile.sh

@@ -5,7 +5,7 @@ set -u
 DIR="$(cd "$(dirname "$0")" && pwd)"
 ROOT="$DIR/../../../../.."
 LAGOM_BUILD="$ROOT/Build/lagom"
-JBIG2_FROM_JSON="$LAGOM_BUILD/bin/jbig2-from-json"
+JBIG2_FROM_JSON=${1:-"$LAGOM_BUILD/bin/jbig2-from-json"}
 
 export DIR
 export JBIG2_FROM_JSON